123738931 has 2 divisors, whose sum is σ = 123738932. Its totient is φ = 123738930.

The previous prime is 123738917. The next prime is 123738959. The reversal of 123738931 is 139837321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123738931 - 2⁷ = 123738803 is a prime.

It is a super-2 number, since 2×123738931² = 30622646090045522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123738961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61869465 + 61869466.

It is an arithmetic number, because the mean of its divisors is an integer number (61869466).

Almost surely, 2^123738931 is an apocalyptic number.

123738931 is a deficient number, since it is larger than the sum of its proper divisors (1).

123738931 is an equidigital number, since it uses as much as digits as its factorization.

123738931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 123738931 is about 11123.8002049659. The cubic root of 123738931 is about 498.3128883782.

The spelling of 123738931 in words is "one hundred twenty-three million, seven hundred thirty-eight thousand, nine hundred thirty-one".